/// <summary>
/// Writes the embedded OLE object from the ObjectPool of the binary file to the OpenXml Package.
/// </summary>
/// <param name="ole"></param>
private void copyEmbeddedObject(OleObject ole, EmbeddedObjectPart part)
{
//create a new storage
StructuredStorageWriter writer = new StructuredStorageWriter();
// Word will not open embedded charts if a CLSID is set.
if (ole.Program.StartsWith("Excel.Chart") == false)
{
writer.RootDirectoryEntry.setClsId(ole.ClassId);
}
//copy the OLE streams from the old storage to the new storage
foreach (string oleStream in ole.Streams.Keys)
{
writer.RootDirectoryEntry.AddStreamDirectoryEntry(oleStream, ole.Streams[oleStream]);
}
//write the storage to the xml part
writer.write(part.GetStream());
}
private static void ExtractFile(EmbeddedObjectPart part, string destinationFolderPath)
{
// Determine the file name and destination path of the binary,
// structured storage file.
string binaryFileName = Path.GetFileName(part.Uri.ToString());
string binaryFilePath = Path.Combine(destinationFolderPath, binaryFileName);
// Ensure the destination directory exists.
Directory.CreateDirectory(destinationFolderPath);
// Copy part contents to structured storage file.
using (Stream partStream = part.GetStream())
using (FileStream fileStream = File.Create(binaryFilePath))
{
partStream.CopyTo(fileStream);
}
// Extract the embedded file from the structured storage file.
Ole10Native.ExtractFile(binaryFilePath, destinationFolderPath);
// Remove the structured storage file.
File.Delete(binaryFilePath);
}